Brush rigging



F. F. DORSEY BRUSH RIGGING oct. 2, 1923. 1,469,720

Filed Dec. 3l 1921 Patented Oct.A 2, 1923.

.PATENTOFFICE EARNUM E. DoRsEY, OE ROCHESTER, NEW YORK, AssIGNOR To NORTH EAST ELECTRIC COMPANY, 0F ROCHESTER, NEW YORK, AVCORPORATION 0E NEW YORK.

BRUSH RIGGING.

s Application led Decemberl, 1921. Serial No. 526,299.

To all whom t may concern Be it known that I, FARNUM F. DoRsEY, a citizen of the United States, residing at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Brush Riggings; and l do hereby declare the following to be afull, clear. and exact description of the invention. such as will enable others skilled in the art to which it appertains to make and use the same. y

This invention relates vto brush-rigging suitable particularly for small electric motors, and the object of the invention is to produce a brush-rigging of simple and inex-y pensive construction, and of such form that it may be conveniently and quickly assembled.

xThe novelty of the invention resides par-v partly rin section, and Fig. 3 is a sectionon the line 3-3 in Fig. 2. f

The invention is illustrated as embodied in an electric motor of a type commonly used in electric signal-horns. v The brushes 5,

' which may be of carbon, are of rectan ular section and are arranged to slide in tu ular or box-like holders or guides 6. Each holder is formed of a single piece of sheet-metal suitably bent, and between the adjacent longitudinal edges ofthe metal is left a slot 7, through which the flexible connector or pig-tail 8 of the brush may move.

Each brush-holder is supported and insulated by a flat piece 9 of sheet insulating r material having a generally rectangular form, with rounded corners. As an inexpensive and convenient means for securing the brush-holder in place, it is provided, at each end, with an integral lug 10 cut at the end of the sheet-metal. and these two lugs are bent backwardly and inwardly so as to clasp the opposite end-edges of the insulating member 9.v These edges are notched to receive the lugs and thus prevent lateral dis*-y placement of the brush-holder.

rPhe insulating members 9 are supported by sulating members. These edges are provided, at their inner extremities, with lugs or extensions 14 to prevent the insulating members from. sliding outwardly in consequence of the pressure of the springs by which the brushes are controlled.

To prevent contact of the lugs 10 with the arms 12, the latter are provided wit-h suitably located holes 15 and recesses 16, which afford the necessary clearance, as shown particularly in Fig. 1.

As a convenlent means for securing the supporting member 11 in place on the frame 17 of the motor, the supporting member is centrally perforated to embrace the bearingsleeve 18 in which the armature-shaft 19 is mounted, and this sleeve is headed over or flanged at the end to secure the supporting member against the frame. Rotation of the supporting member is prevented by a lug 20 which engages a hole in the frame, as

shown in Fig. 2.

- Each brush 5 is provided with a spring 21 seatedin a cap 22, and a screw 23, threaded in the end of the brush-holder, serves both asy an anchorage for the spring and as a. binding screw by which the pigtail 8 may be connected with a lead or wire.

It will be apparent that the brush-rigging described may be made very inexpensively by simple punching and stamping operations, and that its manufacture is simplified by the fact that it may be completed and assembled as a unit distinct from the other parts of the motor.

The invention is not limited to the details of Aconstruction of the embodiment thereof hereinbefore described and shown in the accompanying drawings, but it may be 'embodie-d in various other forms within the scope of the following claims.

The invention claimed is:

1. Brush-rigging comprising: a flat piece of sheet insulating material; a sheet-metal brush-holder provided with lugs embracing opposite edges of the insulating-material; and a sheet-metal support provide-d with lugs embracing otheropposite edges of the insulating material.

inpsmember` of :sheetanetah provided with arms, each arxn having lugs on its lateral edges; a piece of sheet insulating material Secured t0 each arm by engagement of its lateral edges with said lugs; and a brushholder secured t0 each piece ot' insulating maiieiial atthe side opposite the arm by Whieh itv is supported. 

